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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/repl/member_config.h"
#include <boost/algorithm/string.hpp>
#include "mongo/bson/util/bson_check.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/repl/repl_server_parameters_gen.h"
#include "mongo/util/str.h"
namespace mongo {
namespace repl {
const std::string MemberConfig::kInternalVoterTagName = "$voter";
const std::string MemberConfig::kInternalElectableTagName = "$electable";
const std::string MemberConfig::kInternalAllTagName = "$all";
const std::string MemberConfig::kConfigAllTagName = "$configAll";
const std::string MemberConfig::kConfigVoterTagName = "$configVoter";
/* static */
MemberConfig MemberConfig::parseFromBSON(const BSONObj& mcfg) {
try {
return MemberConfig(mcfg);
} catch (const DBException& e) {
uassertStatusOK(e.toStatus().withContext(str::stream() << "member: " << mcfg));
MONGO_UNREACHABLE;
}
}
MemberConfig::MemberConfig(const BSONObj& mcfg) {
parseProtected(IDLParserContext("MemberConfig"), mcfg);
std::string hostAndPortString = getHost().toString();
boost::trim(hostAndPortString);
HostAndPort host;
uassertStatusOK(host.initialize(hostAndPortString));
if (!host.hasPort()) {
// Make port explicit even if default.
host = HostAndPort(host.host(), host.port());
}
_splitHorizon = SplitHorizon(host, getHorizons());
if (isArbiter()) {
if (MemberConfigBase::getPriority() == 1.0) {
setPriority(0);
}
if (!isVoter()) {
uasserted(ErrorCodes::BadValue, "Arbiter must vote (cannot have 0 votes)");
}
if (isNewlyAdded()) {
uasserted(ErrorCodes::BadValue, "Arbiter cannot have newlyAdded field set");
}
}
// Check for additional electable requirements, when priority is non zero.
if (getPriority() != 0) {
if (!isVoter()) {
uasserted(ErrorCodes::BadValue, "priority must be 0 when non-voting (votes:0)");
}
if (getSecondaryDelay() > Seconds(0)) {
uasserted(ErrorCodes::BadValue, "priority must be 0 when secondaryDelaySecs is used");
}
if (isHidden()) {
uasserted(ErrorCodes::BadValue, "priority must be 0 when hidden=true");
}
if (!shouldBuildIndexes()) {
uasserted(ErrorCodes::BadValue, "priority must be 0 when buildIndexes=false");
}
}
}
MemberConfig::MemberConfig(const BSONObj& mcfg, ReplSetTagConfig* tagConfig) : MemberConfig(mcfg) {
addTagInfo(tagConfig);
}
void MemberConfig::addTagInfo(ReplSetTagConfig* tagConfig) {
// When a ReplSetConfig is created from a MutableReplSetConfig, the MemberConfig objects
// may have tags from the original configuration, so we need to clear them before adding
// the tags from the modified configuration.
_tags.clear();
//
// Parse "tags" field.
//
if (getTags()) {
for (auto&& tag : getTags().value()) {
if (tag.type() != String) {
uasserted(ErrorCodes::TypeMismatch,
str::stream()
<< "tags." << tag.fieldName()
<< " field has non-string value of type " << typeName(tag.type()));
}
_tags.push_back(tagConfig->makeTag(tag.fieldNameStringData(), tag.valueStringData()));
}
}
//
// Add internal tags based on other member properties.
//
// Add a voter tag if this non-arbiter member votes; use _id for uniquity.
const std::string id = std::to_string(getId().getData());
if (isVoter() && !isArbiter()) {
_tags.push_back(tagConfig->makeTag(kInternalVoterTagName, id));
}
// Add an electable tag if this member is electable.
if (isElectable()) {
_tags.push_back(tagConfig->makeTag(kInternalElectableTagName, id));
}
// Add a tag for generic counting of this node.
if (!isArbiter()) {
_tags.push_back(tagConfig->makeTag(kInternalAllTagName, id));
}
// Add a config voter tag if this node counts towards the config majority for reconfig.
// This excludes non-voting members but does include arbiters.
if (isVoter()) {
_tags.push_back(tagConfig->makeTag(kConfigVoterTagName, id));
}
// Add a tag for every node, including arbiters.
_tags.push_back(tagConfig->makeTag(kConfigAllTagName, id));
if (isArbiter()) {
// Arbiters have two internal tags.
if (_tags.size() != 2) {
uasserted(ErrorCodes::BadValue, "Cannot set tags on arbiters.");
}
}
}
bool MemberConfig::hasTags() const {
return getTags() && !getTags()->isEmpty();
}
// Changing these members may change the tags, so invalidate them. The tags will be rebuilt
// when addTagInfo is called.
void MemberConfig::setNewlyAdded(boost::optional<bool> newlyAdded) {
_tags.clear();
MemberConfigBase::setNewlyAdded(newlyAdded);
}
void MemberConfig::setArbiterOnly(bool arbiterOnly) {
_tags.clear();
MemberConfigBase::setArbiterOnly(arbiterOnly);
}
void MemberConfig::setVotes(int64_t votes) {
_tags.clear();
MemberConfigBase::setVotes(votes);
}
void MemberConfig::setPriority(double priority) {
_tags.clear();
MemberConfigBase::setPriority(priority);
}
BSONObj MemberConfig::toBSON(bool omitNewlyAddedField) const {
BSONObjBuilder configBuilder;
configBuilder.append(kIdFieldName, getId().getData());
configBuilder.append(kHostFieldName, _host().toString());
configBuilder.append(kArbiterOnlyFieldName, getArbiterOnly());
if (!omitNewlyAddedField && getNewlyAdded()) {
// We should never have _newlyAdded if automatic reconfigs aren't enabled.
invariant(getNewlyAdded().value());
configBuilder.append(kNewlyAddedFieldName, getNewlyAdded().value());
}
configBuilder.append(kBuildIndexesFieldName, getBuildIndexes());
configBuilder.append(kHiddenFieldName, getHidden());
configBuilder.append(kPriorityFieldName, MemberConfigBase::getPriority());
// For historical reasons we always emit a tag field; some jstests expect it.
configBuilder.append(kTagsFieldName, getTags() ? *getTags() : BSONObj());
_splitHorizon.toBSON(configBuilder);
if (getSecondaryDelaySecs()) {
configBuilder.append(kSecondaryDelaySecsFieldName, getSecondaryDelaySecs().value());
}
configBuilder.append(kVotesFieldName, MemberConfigBase::getVotes() ? 1 : 0);
return configBuilder.obj();
}
} // namespace repl
} // namespace mongo
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